Brake mechanism for looms



(No Model.) I

J. H. NORTHROP.

' BRAKE MECHANISM FOR LOOMS. No. 593,070. Patented Nov 2, 1897.

UNITED STATES PATENT @rrrcn.

JAMES H. NORTHROP, OF l-IOPEDALE, MASSACHUSETTS, ASSIGNOR TO THE DRAPER COMPANY, OF SAME PLACE AND PORTLAND, MAINE.

BRAKE M ECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 593,070, dated November 2, 1897.

Application filed May 22, 1897. Serial No. 687,669. (No model.)

To CLZZ 1/077? it may concern:

Be it known that 1, J AMES H. Nonrnnor, of Hopedale, in the county of iVorcester and State of Massachusetts, have invented an 1111- 5 provemcnt in Brake Mechanism for Looms, of which the following description in connection with the accompanying drawings, is a specification, like letters on the drawings represen ting like parts.

This invention relates to brake mechanism for looms wherebythe brake is automatically applied when the shipper is knocked off to stop the loom and automatically released when the shipper is again moved to start the loom.

The construction hereinafter to be described is such that the brake can be manually released while the loom is stopped in order that it may be moved by hand by the attendant, as is often necessary.

The manual controlling member by which release of the brake is effected during stoppage of the loom is attached to the shipperlever and is so constructed that movement of the shipper into running position will throw it out of operation automatically, as will be fully described. d

Figure 1, in elevation, represents a sufficient portion of a loom side to be understood with my present invention applied thereto, the parts being shown in the position assumed when the loom is running. Fig. 2 is a partial front elevation of the apparatus shown in Fig. 1. Fig. 3 is alike view, the parts being shown in position to apply the brake and stop the loom. Fig. i is an enlarged view in elevation of the manual controlling member detached. Fig. 5 is an enlarged detail of some of the parts, the controlling member being shown in operative position to release the brake; and Fig. 6 represents side and end elevations of the supporting-stand for the controlling member.

The loom side A, breast-beam B, having the usual notched holding-plate B for the ship per-lever B the fast and loose pulleys C and O, the brake-wheel G secured to or to rotate with the fast pulley, the belt-shipper B and connections between it and the shipper-lever are and may be of usual construction and need not be described in detail herein.

Ihave herein shown the brake-shoe D as a suitablyshaped arm pivoted at D to the loom side (see Fig. 1) and jointed at d to a rod d, slotted at its forward end to receive a stud d on the usual frog F, the latter when operated by a dagger, (not shown,) upon absence of the A shuttle, acting through a suitable elbow-lever (1 to knock off the sl1ipper-lever B all as common in looms, the operation of the frog applying the brake through the rod (Z.

A collar 01 on the brake-rod (see Fig. 1) is adapted to be engaged by the upturned short arm a of a lever a, pivotally mounted at a? on a stud secured to the loom side, the lever a supporting aweightW', the hooked stem w thereof being adapted to engage one of a series of notches a in the lever-arm a to adjust the weight toward or from the fulcrum o The weight when free to act moves the lever to a into dotted-line position, Fig. 1, and through the rod d applies the brake, the lever and weight constituting a brakeactuator.

A bracket or stand I), having an extended toe I) and an outwardly-bent upturned car 12 is rigidly secured to the side of the shipperlever l3 adjacent its fulcrum b the toe Z2 being of suflicient length to extend beneath the lever-arm a, maintaining it raised in fullline position, Fig. 1, and as shown in Fig. 2, when theshipper-lever is in running position, with the brake released.

hen the shippei lever is moved to stop ping position, Fig. 8, the toe b is lowered to release the brake-actuator, thereby permitting the latter, acting by virtue of the weight 8 5 W to apply the brake automatically, whether the movement of the shipper-lever is effected automatically or by hand.

It is very desirable that the brake may be released while the loom is stopped in order that the attendant may move the operative parts of the loom by hand, and for this purpose I provide a manually-operated controlling member, whereby the brake may be released at such time.

The controlling member is shown separately in Fig. l as a disk-1ike hub 0, having a cam c on its periphery and a non-radial arm 0 secured to or forming a part of the cam, the outer end of the arm being enlarged to in- 100 crease the weight, as at 0 and serve as a han- I claim, and desire to secure by Letters Patdle. The hub is mounted to rock freely on the shipper-lever fulcrum b between the said lever and the ear b of the stand b, said ear having thereon a stop b to cooperate with the face a on the inner end of the arm 0 limiting its movement in one direction, as shown in Fig. 5. Movement of the controlling member in the other direction is limited by engagement of the face 0 of the arm with the straight edge 19 of the ear b in Figs. 2 and 3.

The lever-arm a. has a laterally-extended finger 60*, which projects above and in the plane of the hub o and its cam c, and when the loom is running the toe 12' holds up the arm a, the finger a being out of engagement with the manual controlling member, as in Fig. 2. Then the shipper is in stopping position, Fig. 3, however, the release of the brake-actuator by the toe 1) permits the finger a to rest upon the hub c, the normal position of the controlling member relative to the shipper-lever being shown in Figs. 2 and 3. It now it is desired to release the brake without starting the loom, the attendant grasps the handle 0 of the controlling memher and turns it up into position shown in Figs.

4 and 5, thereby bringing the cam 0 up over or a little past the dead-centerviz., the fulcrum b tl1e cam acting on the finger a and raising the lever-arm a to release the brake.

The position of the cam above center and the pressure of the brake-actuator thereupon retains the controlling member in such position until the shipper-lever is returned to running position, whereupon the cam c is withdrawn from the finger a the actuator is engaged and held inoperative by the toe b, and the controlling member returns by gravity to normal position.

A suitablespring S, attached at one end to the loom-frame and at the other end to the shipper-lever, acts to throw the latter when released from its holding-notch.

The slot-and-stud connection between the brake-rod d and the frog F permits the brakeactuator to apply the brake when the shipper-lever is knocked off by reason of failure of the filling or by hand without operating the frog.

The stop 17 limits the movement of the manual controlling member when operated to release the brake while the loom is stopped.

The mechanism herein shown is simple, strong, readily operated, and not liable to break or get out of order.

It will be, of course, obvious that the ship per-lever may be moved directly to running position from the position shown in Fig. 3 without any intervening operating of the manual controlling member.

Having fully dcscribedmy invention, what cut, is-

1. In a loom, a brake, an actuator therefor, a shipper-lever cooperatin g with said actuator whereby stopping movement of the shipperlever automatically releases the actuator to apply the brake, and a controlling member for said actuator, mounted on the shipper lever, said controlling member being adapted to be moved by the operator independently of the shipper -lever, to release the brake while the loom is stopped, substantially as described.

2. In a loom, a brake, an actuator therefor, a shipper-lever cooperating with said actuator whereby stopping movement of the shipperlever automatically releases the actuator to apply the brake, and a controlling member for the actuator, pivoted on the shipper-lever and adapted to be moved by the operator over its dead-center to release the brake while the loom is stopped, movement of the shipper-lever to running position disengaging the brakeactuator and controlling member, and permitting the latter to return to normal position, substantially as described.

3. In a loom, a brake, an actuator therefor, a shipper-lever cooperating with said actuator E whereby stopping movement of the shipperlever automatically releases the actuator to Z apply the brake, and a controlling member for the actuator, pivot-ally mounted in alinement with the sl1ipper-lever fulcrum, and

adapted to be moved by the operator to re- 4:. In a loom, a brake, an actuator therefor,

% a shipper-lever having a projection to coopi erate therewith, whereby stopping movement jof the shipper-lever automatically releases the actuator to apply the brake, and a finger forming a part of the actuator, a hand-conitroller having a cam port-ion adapted to be i moved by the operator to engage said finger, and thereby release the brake while the loom 1 is stopped, movement of the shipper-lever to running position bringing the projection thereon into engagement with the brake-actuator, and disengaging the actuator-finger and the hand-controller the latter returning to normal position by gravity, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JAMES H. NORTIIROP.

WVitnesses:

HERBERT S. MANLEY, GEO. OTIS DRAPER.

IIC 

